<template>
  <view>
    <view class="search_box">
      <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    </view>
    <!-- // 搜索建议列表 -->
    <view class="sugg_list" v-if="searchResuList.length!==0">
      <view class="sugg_item" v-for="(item,i) in searchResuList" :key="i">
        <view class="goods_name" @click="gotoDetail(item)">{{item.goods_name}}</view>
        <uni-icons type="forward" size="16"></uni-icons>
      </view>
    </view>

    <!-- 搜索历史 -->
    <view class="history_box" v-else>
      <!-- 标题区 -->
      <view class="history_title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区 -->
      <view class="history_list">
        <uni-tag :text="item" inverted="true" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw: '',
        // 搜索的结果列表
        searchResuList: [],
        // 搜索历史数据
        historyList: []

      };
    },
    methods: {
      // input输入时间的处理函数
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.kw = e
          this.getSearchList()
        }, 500)
      },
      async getSearchList() {
        // 判断搜索的关键词是否为空
        if (this.kw.length === 0) {
          this.searchResuList = []
          return
        }
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/goods/qsearch', {
          query: this.kw
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        this.searchResuList = res.message
        this.saveCearchHistory()
      },
      // 点击搜索项跳转至详情页
      gotoDetail(item) {
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      // 保存搜索历史记录
      saveCearchHistory() {
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)

        // 对搜索历史数据进行存储
        uni.setStorageSync('kw', JSON.stringify(this.historyList))
      },
      // 情况搜索历史
      clean(){
        this.historyList=[]
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+'kw'
        })
      }


    },
    computed: {
      histories() {
        return [...this.historyList, ].reverse()
      }
    },
    onLoad() {
    this.historyList= JSON.parse( uni.getStorageSync('kw') || '[]')
    }
  }
</script>

<style lang="scss">
  .search_box {
    position: sticky;
    top: 0;
    z-index: 999;
  }

  .sugg_list {
    padding: 0 5px;

    .sugg_item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;

      .goods_name {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }
    }
  }

  .history_box {
    padding: 0 5px;

    .history_title {
      display: flex;
      justify-content: space-between;
      height: 40px;
      align-items: center;
      font-size: 13px;
      border-bottom: 1px solid #efefef;

    }

    .history_list {
      display: flex;
      flex-wrap: wrap;

      .uni-tag {
        display: block;
        margin-top: 5px;
        margin-right: 5px;
      }
    }

  }
</style>
